Free Thyroxine Index Formula. To apply this formula to yourself, you need your current weight in kilograms. The t7 index is the product of t4 x t3 uptake, divided by 100.
At a trivial level, test nomenclature can be confusing (table 1): The free thyroxine index (fti) is determined by the following calculation: The fti is the product of t3 resin uptake and total t4 levels.
At a trivial level, test nomenclature can be confusing (table 1):
To our knowledge, this is. The page below is a sample from the labce course laboratory assessment of thyroid function (retired 3/27/2020). Fti = thyroxine (t4)/thyroid binding capacity. This with normal ranges, is identifiable by the testing method which the lab uses mostly;
